Everyone knows Bethenny's road to success is shady (she claims to be a rags to riches girl yet was hanging out with Paris Hilton's aunts in her teens) and that is why she is so unhappy. When you do shady things to get ahead you'll always love with unhappiness because you can't take pride in your journey. That's why she resents Luann who carried RHONY when we was busy failing as a talk show host. It bothers her that she wouldn't have a show to come back to if it wasn't for the Countess and that's why she's so cruel to her.